Improvement in millstone-dresses



T. D. JONES. Millstone Dress.

No. 205,556. Patented July 2,1878.-

17/ TNESSES & 6MLW UNITED STATES PATENT OFFroE.

THOMAS D. JONES, OF SYRACUSE, NEW YORK.

IMPROVEMENT IN MILLSTONE-DRESSES.

Specification forming part of Letters Patent No- 205,556, dated July 2,1878; application filed April 13,1878 patented in England, April30,1877.

To all whom it may concern:

Be it known that I, THOMAS D. J mess, of the city of Syracuse, in theState of New York, have invented new and useful Improvements inMillstone-Dresses, of which the following, taken in connection with theaccompanying drawing, is a full, clear, and exact description.

This invention relates to improvements in that class of millstone-dresswhich are designed to prepare the grain fonits finalmanufacture intoflour by subsequent grinding.

The object of the invention is to prevent crushing and undue friction ofthe middlin gs, thoroughly clean all fiour-yieldin g properties from theoffal, and at the same time facilitate both the delivery at the skirtand the ventilation of the stones, thereby producing a comparativelygreater amomlt and superior quality of middlin gs.

It also relates to a novel method of dressing the face of millstones,whereby the same is maintained in its natural grit and prevented fromgumming and glazing.

The invention consists, first, in the hereinafter-described arrangement,disposition, and combination of the lands and furrows of a millstone,whereby the furrow-surface is made greatly predominant over theland-surface around the eye of the stone, and thus the ingross of theair thereat augmented, the grain, instead of being crushed and at oncereduced to flour, is gradually decorticated, and, in a granulated stateand with proper speed, conducted, with the air, to and uniformlydistributed through the bosom-furrows, the passage of the middlings tothe skirt-furrows is unimpeded, the delivery of same and the ventilationat the skirt facilitated, and the lands are so constructed and arrangedas to completely clean all flour-yielding properties from the bran;second, in applying to the surface of the stone diamond-quartz in suchquantity as to cover the said surface, and then subjecting the same to adirect rubbing or scouring action by means of a wooden block or otherequivalent instrument, whereby the surface of the stone is stippled orfilled with minute indentations, and which prevents gumming and glazingof same.

The first part of my invention is clearly illustrated in theaccompanying drawing, which represents a face view of a millstoneprovided with my improved dress, the light portions representing thelands, and the dark or shaded portions the furrows, of the stone.

In the delineation of my improved dress, I describe two concentriccircles from the center of the eye E, as indicated in the drawing, whichcircles will hereinafter be denominated first and second circles,respectively, the first being that near the eye E, and the second beingdescribed with a radius of about eleven sixteenths that of the peripheryof the stone, and constituting the outer periphery of the bosom of thestone. The stone is divided into what is termed quarters by themain'lands a and u These lands are arranged. tangential from the eye ofthe stone to the aforesaid second circle, and from thence to the skirttheir draftis increased by arranging them tangential to the firstcircle. They are made to nearly or completely vanish at the eye andwiden with a uniform taper to the skirt, where they attain a width equalto onefifth the space lying between them. This space, at the skirt, isdivided into two lands, a a and three intervening furrows, b b b, ofequal dimensions, and all arranged for draft given by first circle. Thecentral furrow b is terminated at the second circle, and the two furrowsadjacent to the main lands are intersect-ed at the said circle by thebosom-furrows, which widen toward the eye and are brought to equal widthat their junction with each other, so as to cause'the intermediate landto terminate about midway the bosom of the stone, thereby producing alarge open space around the eye, which materially augments the ingressof the air thereat. The air, receiving an accelerated outward movementby the tangential main lands, is, by the equal division of the two widebosom-furrows, uniformly distributed over the face of the stone, and,finally, at the skirt, where the land-surface is increased and madeequal to the furrow-surface, and consequently greater friction isproduced, the ventilation is enhanced, and the delivery of the groundsubstance facilitated by an increased draft of the lands and furrowsthereat.

The grain, at its entrance between the stones, is but slightly subjectedto friction, and receives a rolling mot-ion, by which it is graduallydivested of the cuticle or hull, and be comes granulated by the time itreaches the increased land-surface. It thence is, like the air, in themanner before described, equally distributed through the branchingfurrows, and maintained distributed uniformly over the surface of thestone by the uniformity of the lands and furrows around the skirt, andis finally ejected at the skirt at an accelerated speed, imparted by theincreased draft of the skirt-furrows and naturally increased motion ofthe stone at its periphery. During its passage through thelatter portionof the millstonedress the bran is completely cleaned of allflouryielding properties by the increased land-surface.

I am aware that it has been customary to give the skirt-furrowsincreased draft; and I therefore do not claim this feature irrespectiveof the arrangement of the bosom -furrows.

hat I do claim as new, and desire to secure by Letters Patent, is

1. The principal lands a, extended tangential from the eye E to thewithin-described second circle, and the bosom-furrows adjacent to saidlands, widening toward the eye and terminating the intervening landcentral between the principal lands and midway the bosom of the stone,in combination with the skirt-furrows b b b and lands a. to (L all ofequal dimensions, and arranged tangential to the within-described firstcircle, the land a constituting a continuation of the principal landextended from the eye, all constructed, arranged, and combinedsubstantially in the manner described and shown, for the purpose setforth.

2. The within-described method of dressing the face of millstones,consisting in applying thereto diamond-quartz in such quantity as tocover the said surface, and then subjecting the same to a direct rubbingor scouring ac tion by means of a wooden block or equivalent instrument,whercby the surface of the stone is stippled or filled with minuteindentations, substantially as set forth.

In witness whereof I, the said THOMAS D. JONES, have hereunto set myhand and seal this 28th day of February, in the year of our Lord 1878.

THOMAS D. JONES. IL. s.]

In presence of FRANK WRIGHT, ROBERT HowDEN.

